The source of the data in the last link is Open Street Map, and these tools together have been great for getting lat/long boundary data of the districts within India's states. However, I'm wondering if the same boundary data exists for India's telecom circles, similar to a map of US area codes.

Also Note that the service areas are not equivalent to the Area (STD) codes. Each Service Area will contain several hundred area codes.
–
Devdatta TengsheFeb 21 '13 at 6:49

Thanks Devdatta--do you know of anywhere that would have a map of the STD codes? Or a document listing all the STD codes that are contained in each Telecom Service Area?I assume that
–
Garrett SimpsonFeb 22 '13 at 6:33

I am not aware of any such map. You could get the list of STD codes, along with the exchange name here (from the BSNL site): 218.248.243.16/bsnl-web/stdSearch.seam?cid=2592194 These points could be geocoded to show them on a map. I don't think it there is a polygon service area for these codes.
–
Devdatta TengsheFeb 22 '13 at 7:31

Sorry, I prematurely hit "enter" full comment: Thanks Devdatta--do you know of anywhere that would have a map of the STD codes? Or a document listing all the STD codes that are contained in each Telecom Service Area? ANd do STD codes just relate to landline phones, or mobile as well? I'm assuming that 1.) all providers in India have the same Telecom Service areas, and you can tell which telecom service area a mobile number comes from by looking at the first 5 digits of the number 2.) the remaining 5 digits of the mobile number can be used to identify the STD code Let me know if I'm wrong!
–
Garrett SimpsonFeb 22 '13 at 7:53

@GarrettSimpson: It doesn't work that well. For landline numbers, there will be a STD code and a local number. The STD code can be from 3 to 5 digits, and the local number can be 5-8 digits. Mobile Numbers are 10 digit, where the first 4 numbers can be used to identify the Service provider, and the rest are given by the company according to their own standards.
–
Devdatta TengsheFeb 22 '13 at 7:59